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Mathmetics

ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams

Q31.
A hall of length 24 cm and breadth 20 m. is to be paved with equal square tiles. What will be the size of the largest tile so that tiles exactly fit and  also find the number of tiles required.
1) 4cm, 20 2) 6cm, 10
3) 2cm, 20 4) 4cm, 30
5)None of these
Answer : 4cm, 30
Explanation :
Size of the largest possible square tile 
= H.C.F ( 24, 20) = 4 m.
So,number of tiles required [(24 x 20)/(4x4) ]=30
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